from tkinter import *

coods = [0, 0, 10, 0, 10, 10, 20, 10, 20, 20, 10, 20, 10, 30, 0, 30]
print('Введите начальную координату X:')
X = int(input())
print('Введите начальную координату Y:')
Y = int(input())
print('Введите начальную коэфицент N:')
N = int(input())

if N == 0 and X >=0 and X <= 500 and Y >= 0 and Y <= 500:
    pass
elif N > 0 and 0 * N + X >= 0 and 0 * N + Y >= 0 and 20 * N + X <= 500 and 20 * N + Y <= 500:
    pass
elif N < 0 and 20 * N + X <= 500 and 20 * N + Y <= 500 and 0 * N + X >= 0 and 0 * N + Y >= 0:
    pass
else:
    print('Размер фигуры превышает размер поля')
    exit()

root = Tk()
root.title('ИТ марафон')
root.geometry("500x500")
canvas = Canvas(bg='white', width=500, height=500)
canvas.pack(anchor=CENTER, expand=1)
canvas.create_polygon(coods[0] * N + X, coods[1] * N + Y,
                      coods[2] * N + X, coods[3] * N + Y,
                      coods[4] * N + X, coods[5] * N + Y,
                      coods[6] * N + X, coods[7] * N + Y,
                      coods[8] * N + X, coods[9] * N + Y,
                      coods[10] * N + X, coods[11] * N + Y,
                      coods[12] * N + X, coods[13] * N + Y,
                      coods[14] * N + X, coods[15] * N + Y,)

root.mainloop()